/*
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import ts from "typescript";
import { getNodeList } from "../utils/index.js";

/**
 * @param {Object} sourceFile 使用typescript解析成的AST数据
 * @returns {number[]} 返回的异常行数
 *
 */
export const BraceAndStateOnSameLine = (sourceFile) => {
  const result = [];
  const list = sourceFile.text.split("\n");

  const report = (node) => {
    const { line } = sourceFile.getLineAndCharacterOfPosition(node.getStart());
    const nodeList = getNodeList(node);
    result.push({
      line,
      nodeList,
    });
  };

  const getLine = (pos) => {
    let pre = 0;
    for (let i = 0; i < list.length; i++) {
      pre += list[i].length + 1;
      if (pos <= pre) {
        return i;
      }
    }
    return -1;
  };

  const processLine = (body) => {
    if (!body) {
      return;
    }
    const braceLine = getLine(body.pos - 1);
    const { line: bodyLine } = sourceFile.getLineAndCharacterOfPosition(
      body.getStart()
    );
    if (braceLine < bodyLine) {
      report(body);
    }
  };

  const delintNode = (node) => {
    if (
      [ts.SyntaxKind.FunctionDeclaration, ts.SyntaxKind.ArrowFunction].includes(
        node.kind
      )
    ) {
      processLine(node.body);
    } else if (node.kind === ts.SyntaxKind.IfStatement) {
      processLine(node.thenStatement);
    }
    ts.forEachChild(node, delintNode);
  };

  delintNode(sourceFile);
  return result;
};
